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  1. Annual report of Captain A.A. Humphreys, topographical engineers, in charge of Office of Explorations and Surveys, War Department, December, 1858.
    By: United States. Office of Explorations and Surveys. - Humphreys, A. A. - Ives, J. C. - Pope, John. - Warren, Gouverneur Kemble,
    Publication info: Washington1859.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Asa Gray correspondence. Senders Ho-Hy,
    By: Gray, Asa, - Holm, Theo. (Theodor), - Holmes, Oliver Wendell, - Holton, Isaac F. (Isaac Farwell) - Holzinger, J. M. (John Michael), - Hooper, Edward William, - Horsford, Frederick Hinsdale, - Howell, Joseph, - Howell, Thomas, - Humphreys, A. A. - Hunnewell, Horatio Hollis, - Hunt, Thomas Sterry, - Hunter, C.L.,
    Contributed by: Harvard University Botany Libraries
    BHL Collections: Harvard University Herbarium, Botany Libraries
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  3. Report upon United States Geographical surveys west of the one hundredth meridian,
    By: Geographical Surveys West of the 100th Meridian (U.S.). - Humphreys, A. A. - Wheeler, George M. (George Montague), - Wright, Horatio Gouverneur,
    Publication info: Washington,Govt. Print. Off.,1875-89.
    Contributed by: Research Library, The Getty Research Institute (archive.org)
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  4. Report upon United States Geographical surveys west of the one hundredth meridian,
    By: Wheeler, George M. (George Montague), - Humphreys, A. A. - Wright, Horatio Gouverneur, - Geographical Surveys West of the 100th Meridian (U.S.)
    Publication info: Washington [D.C.] :G.P.O.,1875-1889.
    Contributed by: Multiple institutions
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